If this student was smart enough to hack Purdue’s computer system, why didn’t he just study and go to class?

Irving Dejohn of New York Daily News reports.

Purdue University graduate gets four-year sentence for grade-changing scandal

This Boilermaker got burned for trying to cook his grades.

A Purdue University graduate was sentenced to 90 days behind bars for hacking into the school’s computer system to take him from a delinquent to a straight-A student.

Roy Sun, 25, was sentenced last week to a four-year prison term — most of which will be served on supervised probation — for breaking into his professors’ computers to fix his and other student’s grades.

The elaborate plot began in 2008 when Sun altered one score to see if he would get caught. When he was able to make the swap undetected, he became emboldened and enlisted fellow student Mitsutoashi Shirasaki.

“When I came back in 2009, I felt really arrogant. I thought I was untouchable,” Sun said during his sentencing last week, according to the Journal and Courier. “It became so much easier to change my grades than going to class and working real hard.”

His senior year, he was a no-show at all of his classes but still earned perfect grades.

Shirasaki and Sun changed a grade for a Sujay Sharma, who didn’t know his grades were being altered but served as a lookout for the diabolical duo.

The two installed keystroke logging devices onto computers that the professors used to input the grades. For the educators that entered grades remotely, Sun hacked into the professor’s personal information and went wild.